NORTH AMERICAN COLEOPTEUA. 
ni 
Mesosternnm narrower tlian tlie coxa : first ventral loofrer than the nietasternuiu ; 
elytral tip tnincHte, the sutural margin near apex not sinuate, hut polished iin- 
puuctate; form short, moderately convex. 
Male, pygidium truncate; female, slightly elongate, rounded at tip. The pos- 
terior femora are dentate in both sexes. 
Length oh — 7 mm.; .22 — .28 inch. Habitat. — Ga., D. C., Pa., N. Y., 111., Iowa, 
Canada. 
Dr. John Hamilton has advised me of the following facts regard- 
ing the habits of this species : “ I have taken (equaUs in April in a 
swampy meadow just thawing out. The insects were in the bunches 
of sedge and coarse grass, and must have been imbeded in ice most 
of the Winter, or under water much of the time. I take the same 
species in this swamp in July on the sedge, and with it I once took 
a few specimens of mbtilis. This meadow is bottom ground between 
two hills.” 
I>. tuberciilata Lacordaire. Original description translated. 
“Oblong, above jeneo-cupreous shining, beneath cinereo-sericeous ; abdomen, 
antenupe and legs rufescent. tiie femora broadly metallic green towards apex; 
prothorax subquadrate, narrowed at the base, anterior angles prominent, the sides 
strongly tuberculate anteriorly, the disc very convex, slightly closely rugose, 
with a deep dorsal channel, entire; elytra short, oblong, the apices declivous, 
separately rounded, above slightly depressed, evidently impressed, finely punc- 
tato striate, punctures aviculate, interstices flat, finely transversely rugose. 
Long. 2| lines. Lat. lines.” 
Mesosternnm nearly as broad as the coxa; first ventral aliout as long as the 
metasternuin ; elytra slightly dehiscent at tip, which is distinctly truncate, the 
impressed or indented s])aces on the disc not deep as in the preceding, but barely 
evident; antennse with third joint twice as long as second; femora difleriug in 
the sexes. 
Male, pygidium truncate, emarginate at middle; posterior femora with an 
acute tooth. Female, pygidium elongate, rounded at tip, posterior femora usually 
unarmed, at most a feeble rudimentary tooth. 
This species is usually quite rufous, tinged with metallic lustre, 
but varies to a darker color, nearly as cupreous as mbtilis. It was 
found at Jamesburg, N. J., July 4, 1890, in large numbers on the 
Sagittaria in the cranberry bogs not mixed with any other species. 
It does not occur in this vicinity on the lilies or reeds, and I have 
no doubt the Sagittaria is its food-plant. 
Length 5 — 8 mm.; .20 — .32 imdi. Habitat. — Mass., N. Y., N. J., D. C. 
I>. LeConte. Original description translated. 
“ Cupreo-seneous ; thorax punctate, quadrate, narrowed behind, angles promi- 
nent, the sides moderately tubei-culate, channeled, apical and basal margins re- 
flexed ; elytra with flat interstices, depressed at the suture, hi -impressed, the 
sides gradually declivous, the apex less truncate (compared with hirticollis). 
Posterior femora strongly clavate, armed with an acute tooth. Long. .3(5. Lake 
Superior.” 
Mesosternum narrower than the coxa ; first ventral longer than the metasternum ; 
elytral tip subtruncate ; form slightly convex, second and third joints of antennje 
nearly equal, punctuation similar to snbtilis, but finer. 
